feat(ti): introduce basic support for the AM62L

The AM62L is a lite, low power and performance optimized family of
application processors that are built for Linux application development.

Some highlights of AM62L SoC are:
 - Single to Dual 64-bit Arm® Cortex®-A53 microprocessor subsystem
 - 16-bit DDR Subsystem that supports LPDDR4, DDR4 memory types.
 - Multiple low power modes support, ex: Deep sleep and RTC+DDR
 - Mailbox transport layer for TI SCI

For more information check out our Technical Reference Manual (TRM)
which is loacted here:

	https://www.ti.com/lit/pdf/sprujb4

Change-Id: I9d7c707b5b220c5ec13bd2de67f872b3da3c308a
Signed-off-by: Dhruva Gole <d-gole@ti.com>
6 files changed